Separation of carrier-free 103Pd and 109Pd by spontaneous electrodeposition</p> </p>
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Spontaneous electrodeposition for the separation of electropositive metal ions is an attractive technique. This technique needs no external electromotive force. In this work, a spontaneous electrodeposition technique has been elaborated for the separation of carrier-free radioisotopes of palladium from neutron-irradiated cadmium targets. The deposited radioactive palladium was removed by dipping the platinum electrode in nitric acid giving a highly pure yield of carrier-free 109Pd and/or 103Pd. The separation factor achieved was reasonable (1.3 . 106). The process is very simple and needs little manipulation and amenable to automation and remote processing. The process is not sensitive to Cd(NO3)2 and HNO3 concentrations. Deposition velocity (4.119±0.353) . 10-2 min-1 and deposition constant 0.1211 cm . min-1 were calculated and from the temperature dependence of the deposition velocity constants, the activation energy (0.1155±0.3169 eV) was also determined. The thermodynamic spontaneity can be satisfied at different concentrations of Pd2+ ions. The process was found to be irreversible.</p> </p>
KeywordsActivation Energy Cadmium Palladium Nitric Acid HNO3
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